Sink trap



S INK TRAP H. A. BELL ETAL .Filed Nov. 15, 194s July 29, 1947.

INVENToRs.

ATTORNEYS IIIII'I. Illll. II

Patented July 29, 1947 UNITED STATES PATENT GFFICE SINK TRAP Harry A.Bell and Walter S. Allen, Detroit, Mich.

Application November 15, 1943, Serial No. 510,358

2 Claims. 1

The present invention relates to sewerage, and more particularly toliquid seal traps for basins, sinks land the like.

The primary object of the invention is to provide a liquid seal trap forexcluding the obnoxious gases from the sewerage system into the home ordwelling and to provide a liquid seal trap with a removable sump tofacilitate the easy cleaning and removal of sediment therefrom.

Another object of the invention is to provide a liquid seal trapparticularly adapted for use in connection with sinks, basins and thelike which is constructed of transparent material such as a plastic orcomposition derived from la phenolic condensation product so that theinterior of the trap will be visible at all times and may be inspectedperiodically so that the same can be removed and cleaned such as whenconsiderable sediment has collected in the removable sump.

Another object of the invention is to provide a liquid seal trap of theabove-mentioned type having a removable sump adapted to be connectedwith the body portion of the trap by means of unique and novel clampingmembers which are easily and readily releasable to allow the removal ofthe sump for the purpose of cleaning and removing rthe sedimenttherefrom.

Another object of the invention is to provide a liquid seal trapparticularly adapted for basins and sinks in which the area of the downspout or pipe is considerably smaller in diameter than the outlet sideof the trap so as to prevent siphoning of the liquid seal away from thetrap by suction created in the downpipe of the sewerage system.

Another object of the invention is to provide a liquid seal trap of theabove-mentioned type in which the downspout area, and outlet areadifferentiation prohibits and eliminates such disadvantages and faultsas found in present-day liquid seal traps such as siphonage, capillarywickage, excessive back pressure, wind oscillation and aspiration.

Another object of the invention is to provide a liquid seal trap inwhich the removable sump is sealed at a considerable depth below its topedge again-st the escape of water from .fthe trap by means of a rubberpacking ring interposed between the lower portion of the body of thetrap and a seat portion formed on the lower portion of the sump so thatsaid packing member will prevent the escape of water into the spacebetween the sidewalls of the sump and trap body when the sump is tightlyclamped in position whereby when the sump i-s removed and thewater inthe trap descends in a sudden rush, it will not overflow from the sumplike the ordinary type, but there will be adequate volume in lwhich tohold all of the water.

Another object of the invention is to provide a liquid seal trap forsewerage systems and particularly sinks, and basins in which the bodyportion is formed with a straight line passageway at the outside of thetrap to facilitate the insertion of a brush or the like and thereby freethe pipe connecting the trap to the downpipe of any sediment depositedor collected therein, land to provide said straight line passagewaywitha removable closure plug in a readily accessible position.

Another object of the invention is to provide a liquid seal trap havinga relatively long downspout or inlet extending into the sealing liquid alconsiderable distance to `prevent the escape of sewer gases into thedwelling or building structure from passing around the lower edge ofsaid downspout or inlet pipe and therethrough to the interior of thebuilding..

Other objects and advantages of the invention will become apparentduring the course of the following description of the accompanyingdnawing, wherein:

Figure 1 is a side elevational view of a liquid l seal trap embodyingthe invention, showing the same applied interposed between a sink andsewage downpipe;

Figure 2 is a top plan view of the liquid seal trap showing the samegreatly enlarged and illustrating the general shape and contour thereof;

Figure 3 is a ventical cross-sectional view taken on line 3-3 of Figure2 looking in the direction of fthe arrows and illustrating in detail thestructural features of the liquid seal trap land its removable sump;

Figure 4 is a horizontal cross-sectional view taken on line 4-4 ofFigure 3 further illustrating the shape of the liquid seal trap andshowing the area differential between the downspourt or inlet and theoutlet area; and

Figure 5 is an enlarged side elevational view of the liquid seal trapillustrating in detail one of the hinged clamping members for retainingthe removable trap sump in place.

General description of the invention The invention broadly comprises aliquid seal trap particularly adapted for use in domestic buildings forcollecting sediment passing through the downspout of a sink or the likeand to provide a removable sump to permit the cleaning of the trap andremoval of Vsediment therefrom Without displacing the volume of watercontained in the trap. Further, the invention embodies a liquid sealtrap which is adapted to be formed of a plastic material, so that thecontents of the sump will be readily visible from time to time to permitcleaning thereof at frequent intervals according to the visiblecondition thereof. Also, the liquid seal trap includes a novel hingedclamping member for securely clamping and retaining the sump in positionso as to cause a seat portion thereon to tightly engage a packing memberto lbe clamped tightly against a seat on the lower portion of the trapibody and thereby seal the trap and sump Iagainst leakage should theliquid level in the trap for any reason whatsoever be raised above itsnormal height.

Detailed description of the invention In the drawing, wherein for thepurpose of illustrating the invention like reference characters will beemployed to designate like parts throughout the same, the referencecharacter 5 will generally be employed to designate the wall of a houseor dwelling to which is secured a sink or basin 6 having an outlet 1 anda drain pipe 6 connected thereto by a threaded coupling sleeve 9.

The above structure is conventional and the invention comprises a liquidseal trap including a body portion generally represented by thereference character I formed of a cylindrical wall member I I preferablymolded and formed of a plastic material such as a synthetic resin orphenolic condensation product. The body portion I0 is open at its lowerend and is reduced as at I2 to form an angularly disposed packing ringseat I3. A top wall I4 is provided at the other end of the cylindricalhousing I0 and said top Wlall is formed with a tubular extension I5having an upper threaded portion I6 for receiving a gland nut I1. Thegland nut I1 is recessed as at I8 for receiving an annular packingelement I9 adapted to contactually engage the lower end of the drainpipe 8 and provide an efective seal for the joint between the drain pipeand the liquid seal trap. It is to be noted that the drain pipe 8extends into lthe tubular extension I5 a considerable distance as shownin Figure 3.

Formed integral with the cylindrical wall member II is a downpipe 20which is likewise formed integral and co-extensive with the tubularextension I5 and said downpipe 20 is of semi-cylindrical form with theends thereof as shown in Figure 4 integrally connected to thecylindrical wall member I I. The lower end of the downpipe 20 terminatesas lat 2I adjacent the reduced porltion I2 of the cylindrical bodymember II so as to extend well down within a body of sealing liquidcontained in the trap.

The top wall I4 of the cylindrical body member I I is provided with atubular housing 22 and said housing is formed integral with the top wallso that the horizontal transverse bore thereof 23 is in communicationwith the interior of the cylindrical body member II. One end ofthetubular housing `22 is threaded externally as at 24 for receiving acoupling sleeve (Figure l) so that the outlet side of the liquid sealtrap may be connected to the downpipe 26 of the sewage system by mea-nsof an interconnecting pipe 21. The opposite end of the tubular housing22 is internally threaded for receiving a removable closure plug 28 tofacilitate the insertion of a wire brush for the purpose of cleaning thehousing extension 22 as well as the interconnecting pipe 21.

It is intended to form or mold the cylindrical `body member II, tuibularhousing 22 and tubular extension I5 in one piece, and las will be noted,the tubular housing 22 is joined to the tubular extension I5 by a webportion 29 while the tubular extension 22 is joined to the top wall I3by similar web portions 30.

Also formed integral with the cylindrical body member II is a, pluralityof circumferentially spaced lugs 3l having tangentially disposedopenings with a reception of the ends of a U-shaped hinged member 32arcuately curved so that the free end 33 will be presented inwardly andtoward the cylindrical body member II as shown in Figure 3. A wireclamping member 35 is provided with loop portions 36 which are adaptedto encircle the straight portion of the U-shaped hinge member 32 as isclearly shown in Figure 5 so that the offset end 31 will provide aclamping member adapted to engage and retain the removable sump inplace.

The removable sump 38 is likewise formed of a plastic material havingtransparent characteristics and said removable sump is substantiallycup-shaped and is provided at its upper end with an annular flange 39adapted to be engaged by the swinging end 31 of the clamping lever 35.The lower end of the cup-shaped sump 38 is tapered inwardly as at lillso as to provide a seat portion complementary with the seat portion I3formed on the lower end of the cylindrical casing Il. The lower end ofthe cup-shaped sump 38 terminates in a semi-spherical sedimentcollection chamber 4I in direct alignment with the interior of thecylindrical wall member II. Interposed between the seatl I3 and thetapered portion 4D is a rubber packing member 42 similar to aconventional fruit jar sealing rubber so that in the event that therubber becomes brittle and disintegrated, the same may be replaced by anordinary fruit-jar sealing ring.

It is to be noted that by lifting the clamping levers 35 outwardly, thefree ends 31 thereof will be moved out of clamping engagement with theflange 3S so as to permit the easy removal of the sump 3B for thepurpose of removing sediment collected in the chamber 4I. Further, it isto be noted that when the sump is replaced, the clamping lever 35 willengage the wall of the sump as shown in Figure 3 so that the free endwill be off center from the connecting portion 33 of the U- shaped hingemember 32 which will securely lock the sump in position and draw thetapered portion 4D thereof intotight sealing engagement with the rubberpacking ring 42 and seat I3.

It will be evident from Figure 3 that because of the fact that thegasket 42 is located at a seat i3 which is near the lower end of thesump 38, the liquid seal is eiected low in the sump 38, hence when theIsump 38 is removed to clean the trap, the sump 38 has suicient capacityto receive all of the liquid within the trap without overflow.Accordingly, this construction prevents any spilling of the contents ofthe trap onto the floor, as occurs in prior types of trap where the sumpcup is sealed near its top. In such prior traps, the sump cap is alreadyfull of liquid before it is removed, hence the liquid flowing out of thetrap causes the sump cup overflow, spilling liquid and sediment onto thefloor.

It is to be understood that the form of the invention herewith shown anddescribed is to be taken as a preferred embodiment of the same and thatvarious changes in the shape, size and arrangement of parts mayberesorted to without departing from the spirit of the invention or thescope of the subjoined claims,

What we claim is:

1. A liquid seal trap comprising a body portion, an inlet pipe connectedto the body portion and having its lower end terminating adjacent thelower end thereof, a tubular member connected to the body portion andproviding an outlet, a cup-shaped sediment sump for the lower end of thecylindrical body portion, complementary packing seats formed on thelower portions of said casing land sump, a. packing zing interposedbetween said packing seats, and clamping members interconnecting saidsump and said body portion for removably holding said -sump in sealingcontact with said body portion, said sump having its sidewall extendingupwardly relatively to the sidewall of said body portion and having itsupper edge disposed remote from said packing seats.

2. A liquid seal trap for basins and sinks comprising a casing having aninlet and an outlet, said casing having its lowermost end open andprovided with a surrounding packing seat, a cupshaped sedimentreceptacle received on the lower end of the casing for closing the openend there of, la, receptacle having its sidewall extending upwardlyco-extensive with the sidewall of said casing and having its upper edgedisposed remote from said packing seat, a packing seat formed on thelower pontion of said cup-shaped receptacle complementary with saidfirst-mentioned packing seat, a packing ring interposed between saidfirst and last-mentioned seats, and a fastening device disposed [betweensaid receptacle and said casing for detachably holding said cupshapedreceptacle on said casing, said receptacle having a, bottom portionextending downwardly below said packing seats to provide a sedimentchamber therein.

HARRY A. BELL.

WALTERA S. ALLEN.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 1,102,136 Calhoun June 30, 19141,884,855 Pyrce Oct. 25, 1932 1,768,599 Holbrook July 1, 1930 2,166,279Barwick July 18, 1939 FOREIGN PATENTS Number Country Date 40,292 GermanyJuly 30, 1887 362,309 Great Britain Dec. 3, 1931

